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IMPROVEMENT IN STAIRS.

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TO ALL WHM IT MAY CONCERN Be it known that I, WILLIAM W. ,P/leaof Troy,in the county of Rensselaer, and State of New York, have invented a newand useful Improvement in the Construction of Stairs .and I do herebydeclare that the following is a full, clear, and exact description ofthe construction and operation of the same, reference being had to theannexed drawings, making a part of this specification, in which- IFigure 1 isaperspective view. I

Figure 2 represents a skeleton or frame for the same.

Figures 3 and 4 are plane views; and

Figure a view ofa triple flight.

The advantages of my improvement consist, first, in its securing greaterease of ascent with al given length of Hoor and height of ceiling; andsecond, in economizing thebase or floor line where that is necessary ordesirable. f

These advantages I effect by combining two or more parallel iiight's ofstairs in the same ascent, as in figs. 1 and 5, each stair in eitherflight dividing the distance between the stairs next above and below litin the opposite ight,iigs.` 1 and 5, e, a', b b; z'. e., instead ofextending the stair from side to side of the stair-case, I divide theminto sections, so as to cut off the superuouslhalf of the stair overwhich the foot israised in passing.'

and supply a separate ightto each foot C D in fig. 1, and C D E in fig,5. The form of the staircase'is further changedin that the riser of eachstair springs from the middle point of its companion' stair, half itsheight being above and halfbelow the top of the accompanying stair, iig.1, c c c, each stair receding halt' the breadth of the stair below it inthe opposite flight, fig. 3, ffj'. The edges of all the stairs-of' bothflights lie in the same plane, gs. 3 and 4, z t y Fig. 2 represents theframework of a double flight. The centre piecesF Fare so joinedtogether, as to their serrated edges o o o, that the centre point ofeach step intersects thecentrc of the riser next above it, so that thepoints lie in a-straight line. v A comparisonof the proportions of such-a staircase with those of the'kind now in use will make my plan clearerand its advantages more obvious; e. g, to build in the ordinary mode,straight from floor to door, the perpendicular distance between doorsbeing ten (1 0) feet, requires fifteen (15) steps, ten .(10) inchesbroad, with risers eight (8) inches broad, demanding a base or oor'lineof twelve (12) feet six (6) inches.. But by my improved method, the sameheight ten v(10) feet, Will be reached with av base line of only ten(10) feetat the same time allowing twelve'(12) inches breadth to eachstair, and reducing tosix.(6) inches breadth eachhalf risenl `I thusgain, over the old plan, a space ou the door 'of two (2) feet six (6)inches, diminish cach lift of foot two (2) inches, and increase thebreadth of each stairtwo inches. i

The maximum capacity of my improvement is to reduce the base line on thclower oor to exactly oneh-alf its usual length, or by retaining thewhole base line to'applylthis gain to an increase in the breadth o thesteps, and a decrease in the breadth' of the risers. But-by varyingtheproportions of the steps, risers, and base line, all conditions, whetherof necessity or comfort, can be met.

I do not claim as my invention the use of steps and risers inconstructing stairs, but what I claim, and desire to secure by LettersPatent, is I V I The combination of two or more parallel flights orsections in one staircase, or ascent of steps assigning a separate Hightto each foot, substantially in the manner and for the purposes setforth.

WM. W. PAGE.

Witnesses:

HARLAN PAGE, MARIA N. PAGE.

